BUG: Math formulas are rendering at a extremely small size in the app and cannot be zoomed
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	Florian
	Aug 3 2015, 4:31 PM

Description

Background

If you have a very big formula, it will be display in one line and as big as possible to fit the device width. The problem is, that you can't zoom into this formula, and you can't open the media as an image to zoom in. It should be possible to zoom into a math formula.
Reports from OTRS:

Equation is inscrutably tiny	Not visible
Negative frequency	Van der Waals force	Maxwell Boltzmann distribution

Note that in iOS these equations are being placed in a "More info" box but still causes some issues depending on individual formula rendering:
Screenshot of iOS representation of equation in 'Negative frequency' article

iOS-recording-0407-005521.gif (960×540 px, 414 KB)

Details

Related Changes in Gerrit:

	Subject	Repo	Branch	Lines +/-
	Render math formulas correctly on API <19.	apps/android/wikipedia	master	+123 -2
	Fix: no longer use custom CSS for handling math formulae.	apps/android/wikipedia	master	+84 -45

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Related Objects
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		Status	Subtype	Assigned	Task
		Resolved		Dbrant	T103675 Android app fails to render formulas
		Resolved		Dbrant	T107775 BUG: Math formulas are rendering at a extremely small size in the app and cannot be zoomed

Event Timeline

Florian created this task.Aug 3 2015, 4:31 PM

Florian raised the priority of this task from to Needs Triage.

Florian updated the task description. (Show Details)

Florian added a project: Wikipedia-Android-App-Backlog.

Florian subscribed.

Restricted Application added a subscriber: Aklapper. · View Herald TranscriptAug 3 2015, 4:31 PM

JensLiebenau subscribed.Aug 3 2015, 8:19 PM

Dbrant moved this task from Needs Triage to Product Backlog on the Wikipedia-Android-App-Backlog board.Aug 7 2015, 6:13 PM

I'm not sure the OTRS ticket is correct but I also don't speak that language :) I looked at the Fourier transform article for an example. Is the desired behavior to make the math formulas clickable like pictures or to make the whole page zoomable or something else?

In T107775#1568593, @Niedzielski wrote:

Is the desired behavior to make the math formulas clickable like pictures or to make the whole page zoomable or something else?

To be able to click the formulas like an image. The goal is to make it possible to zoom into a formula, and I think that open them as an image is a better idea as zooming the whole page :)

MBinder_WMF added a project: OKR-Work.Aug 25 2015, 5:13 PM

This could also fix such a rendering:

Screenshot_20160213-212614.png (1×1 px, 240 KB)

Reported in: https://ticket.wikimedia.org/otrs/index.pl?Action=AgentTicketZoom;TicketID=8836003

Restricted Application added a subscriber: StudiesWorld. · View Herald TranscriptFeb 13 2016, 8:26 PM

Added more recent tickets and examples

RHo updated the task description. (Show Details)Apr 6 2017, 11:32 PM

RHo added a parent task: T103675: Android app fails to render formulas.

RHo mentioned this in T103675: Android app fails to render formulas.Apr 6 2017, 11:36 PM

RHo mentioned this in T162423: BUG: Mathematical formulas in some instances are not displayed when article is switched to dark mode .Apr 6 2017, 11:47 PM

yaominghai subscribed.Apr 7 2017, 2:06 AM

• Mholloway subscribed.Apr 20 2017, 1:55 PM

Change 351840 had a related patch set uploaded (by Dbrant; owner: Dbrant):
[apps/android/wikipedia@master] Fix: no longer use custom CSS for handling math formulae.

https://gerrit.wikimedia.org/r/351840

gerritbot added a project: Patch-For-Review.May 4 2017, 1:49 PM

Change 351913 had a related patch set uploaded (by Dbrant; owner: Dbrant):
[apps/android/wikipedia@master] [PoC] Render math formulas correctly on API <19.

https://gerrit.wikimedia.org/r/351913

Change 351840 merged by jenkins-bot:
[apps/android/wikipedia@master] Fix: no longer use custom CSS for handling math formulae.

https://gerrit.wikimedia.org/r/351840

Change 351913 merged by jenkins-bot:
[apps/android/wikipedia@master] Render math formulas correctly on API <19.

https://gerrit.wikimedia.org/r/351913

please reopen if still an issue.

Physikerwelt mentioned this in T167593: Render MathML formulae in android app.Jun 11 2017, 11:49 AM

	F7323020: main-MainActivity-04072017011938.png
	Apr 6 2017, 11:27 PM

	F7322465: main-MainActivity-04072017005728.png
	Apr 6 2017, 11:27 PM

	F7322445: main-MainActivity-04072017005702.png
	Apr 6 2017, 11:27 PM

	F3354109: Screenshot_20160213-212614.png
	Feb 13 2016, 8:26 PM

BUG: Math formulas are rendering at a extremely small size in the app and cannot be zoomedClosed, ResolvedPublicActions